Interlayer condensation of protonated layered silicate magadiite through refluxing in N-methylformamide

Yusuke Asakura, Nami Hosaka, Shimon Osada, Taichi Terasawa, Atsushi Shimojima, Kazuyuki Kuroda

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    Interlayer-condensed materials of protonated layered silicate (magadiite) are synthesized by refluxing in Nmethylformamide (NMF) and the subsequent calcination. The obtained materials possess 23 times higher surface areas than calcined protonated magadiite, depending on the time of refluxing. NMF molecules in the interlayer spaces are converted to organic substances with higher thermal stability during the refluxing, which is useful for the control of the stacking sequence of silicate layers and for the following interlayer condensation to increase the microporosity. The microporosity of the material obtained by the treatment of protonated magadiite with NMF at r.t. and the subsequent calcination is similar to that of simply calcined protonated magadiite, indicating that the retention of thermally stable substances in the interlayer is critical for the increase in the pore volume and surface area of the derivative from magadiite. The method reported here will stimulate re-estimation of a large number of known layered silicateorganic intercalation compounds as possible candidates for the preparation of porous silica by interlayer condensation.

    Original languageEnglish
    Pages (from-to)1241-1249
    Number of pages9
    JournalBulletin of the Chemical Society of Japan
    Volume88
    Issue number9
    DOIs
    Publication statusPublished - 2015

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    methylformamide
    Silicates
    Condensation
    Microporosity
    Calcination
    Intercalation compounds
    Silicon Dioxide
    Thermodynamic stability
    Derivatives
    Molecules

    ASJC Scopus subject areas

    • Chemistry(all)

    Cite this

    Interlayer condensation of protonated layered silicate magadiite through refluxing in N-methylformamide. / Asakura, Yusuke; Hosaka, Nami; Osada, Shimon; Terasawa, Taichi; Shimojima, Atsushi; Kuroda, Kazuyuki.

    In: Bulletin of the Chemical Society of Japan, Vol. 88, No. 9, 2015, p. 1241-1249.

    Research output: Contribution to journalArticle

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    AU - Asakura, Yusuke

    AU - Hosaka, Nami

    AU - Osada, Shimon

    AU - Terasawa, Taichi

    AU - Shimojima, Atsushi

    AU - Kuroda, Kazuyuki

    PY - 2015

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    N2 - Interlayer-condensed materials of protonated layered silicate (magadiite) are synthesized by refluxing in Nmethylformamide (NMF) and the subsequent calcination. The obtained materials possess 23 times higher surface areas than calcined protonated magadiite, depending on the time of refluxing. NMF molecules in the interlayer spaces are converted to organic substances with higher thermal stability during the refluxing, which is useful for the control of the stacking sequence of silicate layers and for the following interlayer condensation to increase the microporosity. The microporosity of the material obtained by the treatment of protonated magadiite with NMF at r.t. and the subsequent calcination is similar to that of simply calcined protonated magadiite, indicating that the retention of thermally stable substances in the interlayer is critical for the increase in the pore volume and surface area of the derivative from magadiite. The method reported here will stimulate re-estimation of a large number of known layered silicateorganic intercalation compounds as possible candidates for the preparation of porous silica by interlayer condensation.

    AB - Interlayer-condensed materials of protonated layered silicate (magadiite) are synthesized by refluxing in Nmethylformamide (NMF) and the subsequent calcination. The obtained materials possess 23 times higher surface areas than calcined protonated magadiite, depending on the time of refluxing. NMF molecules in the interlayer spaces are converted to organic substances with higher thermal stability during the refluxing, which is useful for the control of the stacking sequence of silicate layers and for the following interlayer condensation to increase the microporosity. The microporosity of the material obtained by the treatment of protonated magadiite with NMF at r.t. and the subsequent calcination is similar to that of simply calcined protonated magadiite, indicating that the retention of thermally stable substances in the interlayer is critical for the increase in the pore volume and surface area of the derivative from magadiite. The method reported here will stimulate re-estimation of a large number of known layered silicateorganic intercalation compounds as possible candidates for the preparation of porous silica by interlayer condensation.

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